Consider the following BNF grammar G2 used in the next two questions ir exprs then stmt> else stmt other ::true false where other is a terminal that stands for any other kinds of statements, and is the start non- terminal Suppose we adopt the following disambiguating rule used in most languages: match each else with the closest previous unmatched then. Using this disambiguating rule, write an unambiguous grammar that is equivalent to grammar G2 Consider the following BNF grammar G2 used in the next two questions ir exprs then stmt> else stmt other ::true false where other is a terminal that stands for any other kinds of statements, and is the start non- terminal Suppose we adopt the following disambiguating rule used in most languages: match each else with the closest previous unmatched then. Using this disambiguating rule, write an unambiguous grammar that is equivalent to grammar G2